// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/resources/scoped_resource.h"

#include <stddef.h>

#include "cc/test/fake_resource_provider.h"
#include "cc/test/test_context_provider.h"
#include "cc/test/test_shared_bitmap_manager.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace cc {
namespace {

    TEST(ScopedResourceTest, NewScopedResource)
    {
        scoped_refptr<TestContextProvider> context_provider = TestContextProvider::Create();
        ASSERT_TRUE(context_provider->BindToCurrentThread());

        std::unique_ptr<SharedBitmapManager> shared_bitmap_manager(
            new TestSharedBitmapManager());
        std::unique_ptr<ResourceProvider> resource_provider = FakeResourceProvider::Create(context_provider.get(),
            shared_bitmap_manager.get());
        std::unique_ptr<ScopedResource> texture = ScopedResource::Create(resource_provider.get());

        // New scoped textures do not hold a texture yet.
        EXPECT_EQ(0u, texture->id());

        // New scoped textures do not have a size yet.
        EXPECT_EQ(gfx::Size(), texture->size());
        EXPECT_EQ(0u, ResourceUtil::UncheckedSizeInBytes<size_t>(texture->size(), texture->format()));
    }

    TEST(ScopedResourceTest, CreateScopedResource)
    {
        scoped_refptr<TestContextProvider> context_provider = TestContextProvider::Create();
        ASSERT_TRUE(context_provider->BindToCurrentThread());

        std::unique_ptr<SharedBitmapManager> shared_bitmap_manager(
            new TestSharedBitmapManager());
        std::unique_ptr<ResourceProvider> resource_provider = FakeResourceProvider::Create(context_provider.get(),
            shared_bitmap_manager.get());
        std::unique_ptr<ScopedResource> texture = ScopedResource::Create(resource_provider.get());
        texture->Allocate(gfx::Size(30, 30), ResourceProvider::TEXTURE_HINT_IMMUTABLE,
            RGBA_8888, gfx::ColorSpace());

        // The texture has an allocated byte-size now.
        size_t expected_bytes = 30 * 30 * 4;
        EXPECT_EQ(expected_bytes, ResourceUtil::UncheckedSizeInBytes<size_t>(texture->size(), texture->format()));

        EXPECT_LT(0u, texture->id());
        EXPECT_EQ(static_cast<unsigned>(RGBA_8888), texture->format());
        EXPECT_EQ(gfx::Size(30, 30), texture->size());
    }

    TEST(ScopedResourceTest, ScopedResourceIsDeleted)
    {
        scoped_refptr<TestContextProvider> context_provider = TestContextProvider::Create();
        ASSERT_TRUE(context_provider->BindToCurrentThread());

        std::unique_ptr<SharedBitmapManager> shared_bitmap_manager(
            new TestSharedBitmapManager());
        std::unique_ptr<ResourceProvider> resource_provider = FakeResourceProvider::Create(context_provider.get(),
            shared_bitmap_manager.get());
        {
            std::unique_ptr<ScopedResource> texture = ScopedResource::Create(resource_provider.get());

            EXPECT_EQ(0u, resource_provider->num_resources());
            texture->Allocate(gfx::Size(30, 30),
                ResourceProvider::TEXTURE_HINT_IMMUTABLE, RGBA_8888,
                gfx::ColorSpace());
            EXPECT_LT(0u, texture->id());
            EXPECT_EQ(1u, resource_provider->num_resources());
        }

        EXPECT_EQ(0u, resource_provider->num_resources());
        {
            std::unique_ptr<ScopedResource> texture = ScopedResource::Create(resource_provider.get());
            EXPECT_EQ(0u, resource_provider->num_resources());
            texture->Allocate(gfx::Size(30, 30),
                ResourceProvider::TEXTURE_HINT_IMMUTABLE, RGBA_8888,
                gfx::ColorSpace());
            EXPECT_LT(0u, texture->id());
            EXPECT_EQ(1u, resource_provider->num_resources());
            texture->Free();
            EXPECT_EQ(0u, resource_provider->num_resources());
        }
    }

} // namespace
} // namespace cc
